closed My / Your / The and so on .. ?!

[Mykeul]

Hello here,

Sorry for the noob question but I wonder if I miss something.
I see lots of domain sellers offering domains with "the", "your", "my" and other prefixes/suffixes.

To me, these domains seem useless, lets take ipadexamples :
- youripad.com : no one types "your ipad" direct or google search .. so completely useless to me..
- myipad.com : more chances to get direct type in visitor, however, it seems that search engines cut off stopwords like "my", "and" ... so seems useless to
- theipad.com : exactly like "my" ...

I am sure you get what I mean, could someone explain me the interest ?

Thanks for your time

Mykeul